I have looked on websites, yeah - but that's after months of getting no proper answers from the doctor/s. I've had this "condition" or whatever for 18-24 months now and it's progressively getting worse. To be fair, i have had a few tests (a basic chest x-ray and sputum) and nothing was found so it's basically them thinking i'm psychosomatic now despite me proving an array of symptoms to them. 'Cause i'm a young lad that's not had any health problems before they don't consider it anything to worry about.
Go to a different doctor. Describe your symptoms precisely, give a general gist of what you might think it is and ask for a referral. IF you can provide a point of referral it's even better.
Some doctors are useless. I heard on a Radio call-in show about a year ago, multiple accounts of GPs not taking young people seriously. Some of them had cancer, heart defects, arthritis and other serious illnesses and it often took them multiple visits and multiple doctors before they were taken seriously.
I'm lucky enough that I haven't had that problem but if I was in your shoes I'd change doctor.